v3.25.2
Regulatory Matters - (Narrative) (Details) - USD ($)
$ in Millions
1 Months Ended 2 Months Ended
Mar. 31, 2025
Oct. 31, 2024
May 31, 2024
Jun. 30, 2025
Consumers Energy Company        
Public Utilities, General Disclosures [Line Items]        
Financial impact of emergency order       $ 29
Consumers Energy Company | Service Restoration Cost Deferral Application        
Public Utilities, General Disclosures [Line Items]        
Regulatory asset       $ 54
Electric Rate Case        
Public Utilities, General Disclosures [Line Items]        
Amended requested annual rate increase   $ 277    
Electric Rate Case | Consumers Energy Company        
Public Utilities, General Disclosures [Line Items]        
Requested annual rate increase     $ 325  
Requested annual rate increase, as a percent     10.25%  
Surcharge for the recovery of excess distribution investments $ 22      
Additional annual rate increase authorized $ 176      
Rate of return on equity authorized 9.90%      
Electric Rate Case, First Component | Consumers Energy Company        
Public Utilities, General Disclosures [Line Items]        
Requested annual rate increase     $ 303  
Electric Rate Case, Second Component | Consumers Energy Company        
Public Utilities, General Disclosures [Line Items]        
Surcharge for the recovery of excess distribution investments     $ 22